[temporarara]

It's important to take into account the construction costs (and all the parties that are profiting from building new stuff). I think the cost of construction has gone up a lot in recent history. People in general also have much more luxurious requirements for housing than in the past which contributes to the cost. So, building just more is not some magical way to solve this. It's one efficient tool, however, especially if legislative point is made to strongly prefer affordable housing (and be strict about it).